问题
选择题
The professor said he could talk on _____ interested the audience.
A．any topic
B．which topic
C．whichever topic
D．the topic he thought it
答案
答案：C
whichever已失去疑问含义，等于 anything that，表示强调；而 which topic中 which保留疑问含义，译成"哪一个题目"，不符合句义。而A和D中缺少连词。